Triangular pole or column.



No. 666,146. Patented Ian. l5, I901. J. LANZ.

TRIANGULAR POLE 0B COLUMN.

(Apphcat on 111 dBpt 20 1899) (No Model.)

S E S S E N W W NITE STATES Fries.

PATENT TRIANGULAR POLE OR COLUMN.

SPECIFICATION formingpart of Letters Patent N 0. 666,146, dated January15, 1901.

Application filed September 20, 1899. Serial No. 731,062. (No model.)

T at. whom it may concern.-

Be it known that I, JOHN LANZ,of Pittsburg, in the county of Alleghenyand State of Penn sylvania, have invented a new and useful Improvementin Triangular Poles or Columns, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings,forming part of this specification, in Which Figure 1 is a sideelevation, partly broken away, of my improved pole or column. Fig. 2 isa top plan view of the same. Fig. 3 is a section on the line III IIIofFig. 1; and Fig. 4 is a cross-section similar to Fig. 3, showing amodified construction.

My invention relates to poles or columns, especially those used fortrolley-poles, and is designed to provide a cheap, light, and strongconstruction. i

In the drawings I show a pole consisting, essentially, of three channelshaving troughshaped webs 2 and flanges 3 3, the troughs being placed atthe apices of a triangle. The pole is preferably straight from its lowerend to the point marked Ct a, and throughout this portion the channelsare spaced apart and, fora certain portion thereof, strengthened byintermediate channels 4:, having their flanges 5 riveted to the flangesof the trough-channels, as shown in Fig. 3. These supplemental shortchannel sections 4: extend partially above and partially below theground-level,

and for this portion a casing 6 is preferably provided, which may besecured to the channels in any desired manner. Below the lower end ofthe short channel-sections the flanges 3 of the outer channels aresecured together by pipe-rivets 7, as shown in Fig. 1.

From the level a a, at which the short chan nel-sections terminate, thepole tapers upwardly to about the level I) 1), within a short distanceof the top, the top portion above this point being straight. Throughoutthe tapered portion the flanges of the channels are secured together bytubular or pipe rivets 7, of gradually-decreasing length, and above thetapered portion the flanges 3 are riveted directly togetheig'as shown inFig. 2. A strong and symmetrical pole is thus afforded, in which themetal is well adapted for withstanding strains by reason of thetriangular shape, While the fastening-rivets are all exterior to thehollow interior, and consequently the column may be easily made.

I have shown the trough portions of the channeled sections as providedwith a blunt or rounded corner; but the sections may be rolled with asharp angle or of such other trough-section that they may bestraightened after rolling and while at the necessary angle without anybending or further operations than assembling and securing together.

Instead of using channels at the corners of the triangle I may use twoangles 8, which are secured to inner triangular bands or rings 9. In thelower straight portion of the pole, of which I show the cross-section inFig. 4c, the channel-sections 4' are secured to the angles by exteriorrivets in the same manner as the previous form. V

The advantages of myinvention result from the cheapness and ease ofconstruction of the pole and the distribution of the metal in thetriangular form, which is peculiarly adapted to the withstanding ofstrains to which a pole or column is subjected.

Manychanges may be made in the form and arrangement of the parts withoutdeparting from my invention.

I claim 1. A pole or column of triangular form and having flat sides,said pole containing flanged shapes with the flanges locatedintermediate of the corners; substantially as described.

2. A pole or column of triangular form, having channeled shapes at thecorners thereof, and projecting flanges between the corners;substantially as described.

3. A triangular column having flat sides and containing channels withtheir flangessecured together by exterior rivets, said flanges beingbetween the corners; substantially as described.

4. A pole or column containing channeled sections, said sections beingspaced apart by shorter channeled sections secured between them, withthe flanges of the shorter sections fitting against those of the longersections; substantially as described.

5. A hollow pole or column containing shapes arranged to inclose atriangle with flat sides, and having a straight portion and a taperingportion; substantially as described.

6 Atriangular column having outwardlyprojecting flanges intermediate ofthe corners and secured together, said flanges being sub stantially atright angles to the sides of the column, substantially as described.

a tapering portion and containing channeled sections, said sectionsbeing spaced apart in the straight portions by longitudinal sections ofshorter length having flat faces fitting against the flange-faces of thechanneled sections and secured to said flanges; substantially asdescribed.

In testimony whereof I have hereunto set my hand.

JOHN LANZ. Witnesses:

H. M. CoRWIN, GEO. B. BLEMMING.

